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Friday, January 14, 2011

Geotech/Pilings

The first item of business, now that the lot has been selected, is to confirm what we think we already know from the developer at Grand Harbour: that the home can be built on grade without any pilings. Pilings are used when the land is not solid enough to support the weight of the house and a series of concrete columns must be poured to support the slab of the home.

The diagram above shows how a drilling rig must be retained to drill through the soil and marl into bedrock (1+2), concrete must then be pumped through the auger or drill bit (3+4), and then a steel cage dropped into the uncured concrete to provide strength. It is common for a custom home to require as many as 50 of these pilings before the construction of the home can begin.  To assure that this will not be necessary we went out to the site with our structural designer Joe Coe from Lloyd Hue Structural Engineers Ltd to have a good look at the site.

Check out the short video on how the testing went here.